Last and most compelling is my question...still as yet unanswered (I don't think anyone really wants to answer it)....
4. Why do those who cannot explain them, do not know where they came from and do not practice them feel like everyone else, and we... who do know them, explain them and practice and use them feel like we do?
Your question is not terribly compelling to many of those of us who have been fortunate enough to train regularly with teachers far above our own levels of experience and expertise. Saotome and Ikeda do not "feel like everyone else." Interestingly, Ikeda does not feel like Saotome. Continuing with Japanese shihan from the "Seigo Yamaguchi line", the few times I took ukemi for Endo, he did not feel like everyone else, either --- although he felt more like Ikeda then Saotome. As for the quality of these teachers' explanations of how they do what they do, I take it for granted that I will learn much more from feeling them, watching them, and attempting to emulate what I perceive, than I will from merely listening to them.